In Avaya Aura, which component is primarily utilized for call routing decisions?

The correct choice is Avaya Aura Session Manager, as it serves a crucial role in managing call routing within the Avaya Aura architecture. Session Manager is responsible for establishing, controlling, and terminating sessions, which include voice and video calls, and making the appropriate routing decisions based on pre-configured policies and routing tables.

It acts as the central point for handling communications across the network, allowing for both interconnecting sessions between different endpoints and facilitating multimodal communication. Its ability to manage call flows intelligently enhances functionality like load balancing, failover, and interoperability between various communication systems.

In contrast, the other components have different primary functions. The Avaya Aura Media Server is mainly involved in media processing and providing service functionalities such as conferencing or media handling, rather than making routing decisions. Avaya Aura Communication Manager focuses on call control and feature execution, while Avaya Aura System Manager is primarily responsible for overall management and administration of the Avaya Aura product suite. Each component plays a vital role in the system, but for the specific task of call routing, Session Manager is the key element.